羧甲基纤维素对硼镁石/蛇纹石浮选的影响及其作用机理  

Effect of Carboxymethyl Cellulose on Flotation of Ascharite/Serpentine and Its Action Mechanism

作　　者：李治杭 熊堃 左可胜[2] 高鹏[3] LI Zhihang;XIONG Kun;ZUO Kesheng;GAO Peng(State Key Laboratory of Mineral Processing Science and Technology,Beijing 102200,China;School of Earth Science and Resources,Chang′an University,Xi′an 710054,China;School of Resources and Civil Engineering,Northeastern University,Shenyang 110004,China)

机构地区：[1]矿物加工科学与技术国家重点实验室,北京102200 [2]长安大学地球科学与资源学院,陕西西安710054 [3]东北大学资源与土木工程学院,辽宁沈阳110004

出　　处：《金属矿山》2024年第10期107-111,共5页Metal Mine

基　　金：国家自然科学基金项目(编号:52304281);矿物加工科学与技术国家重点实验室开放基金(编号:BGRIMM-KJSKL-2023-04)。

摘　　要：针对微细粒蛇纹石阻碍硼镁石浮选回收的问题,通过浮选试验、Zeta电位分析、FTIR、XPS等多种手段,研究了羧甲基纤维素(CMC)对硼镁石/蛇纹石浮选分离的影响。结果表明,当CMC用量50~150 mg/L时,可明显抑制蛇纹石上浮,硼镁石浮选回收率可提升8~10个百分点;当CMC用量超过150 mg/L时,蛇纹石和硼镁石同时受到抑制,不利于提升浮选指标。机理分析表明,CMC吸附于蛇纹石表面后可显著降低蛇纹石表面电位,CMC通过氢键作用和化学吸附作用于蛇纹石表面,前者是CMC结构中的—OH与蛇纹石表面的Mg—OH相互作用的结果,后者则是通过CMC与蛇纹石表面Mg原子作用而实现的。Aiming at the problem that fine serpentine hinders the flotation recovery of ascharite,the effect of carboxymethyl cellulose(CMC)on the flotation separation of ascharite/serpentine is studied by flotation test,Zeta potential analysis,FTIR,XPS and other means.The results show that when the dosage of CMC is 50~150 mg/L,the floating of serpentine can be obviously inhibited,and the flotation recovery rate of ascharite can be increased by 8~10 percentage points.When the dosage of CMC is more than 150 mg/L,serpentine and ascharite are inhibited at the same time,which is not conducive to improving the flotation index.The mechanism analysis shows that CMC adsorbed on the surface of serpentine can significantly reduce the surface potential of serpentine.CMC acts on the surface of serpentine through hydrogen bonding and chemical adsorption.The former is the result of the interaction between—OH in CMC structure and Mg—OH on the surface of serpentine,while the latter is achieved by the interaction between CMC and Mg atoms on the surface of serpentine.

关 键 词：浮选 羧甲基纤维素 蛇纹石 硼镁石 抑制机理 吸附 

分 类 号：TD923[矿业工程—选矿]